<template>
  <div class="cropper-content">
    <div class="cropper-box">
      <div class="cropper">
        <vue-cropper ref="cropper" :img="option.img" :outputSize="option.outputSize" :outputType="option.outputType"
          :info="option.info" :canScale="option.canScale" :autoCrop="option.autoCrop"
          :autoCropWidth="option.autoCropWidth" :autoCropHeight="option.autoCropHeight" :fixed="option.fixed"
          :fixedNumber="option.fixedNumber" :full="option.full" :fixedBox="option.fixedBox" :canMove="option.canMove"
          :canMoveBox="option.canMoveBox" :original="option.original" :centerBox="option.centerBox"
          :height="option.height" :infoTrue="option.infoTrue" :maxImgSize="option.maxImgSize" :enlarge="option.enlarge"
          :mode="option.mode" @realTime="realTime" @imgLoad="imgLoad" style="width:600px;height:360px;">
        </vue-cropper>
      </div>
      <!--底部操作工具按钮-->
      <div class="footer-btn">
        <div class="scope-btn">
          <label class="btn" for="uploads">选择封面</label>
          <input type="file" id="uploads" style="position:absolute; clip:rect(0 0 0 0);"
            accept="image/png, image/jpeg, image/gif, image/jpg" @change="selectImg($event)">
          <el-tooltip class="item" effect="dark" content="滚轮也可对图片进行缩放" placement="bottom">
            <el-button size="mini" type="danger" plain icon="el-icon-zoom-in" @click="changeScale(1)">放大</el-button>
          </el-tooltip>
          <el-tooltip class="item" effect="dark" content="滚轮也可对图片进行缩放" placement="bottom">
            <el-button size="mini" type="danger" plain icon="el-icon-zoom-out" @click="changeScale(-1)">缩小</el-button>
          </el-tooltip>
          <el-button size="mini" type="danger" plain @click="rotateLeft">↺ 左旋转</el-button>
          <el-button size="mini" type="danger" plain @click="rotateRight">↻ 右旋转</el-button>
        </div>
        <div class="upload-btn">
          <el-button size="mini" type="success" @click="uploadImg('blob')" :load="uploadLoading">{{ uploadContent }} <i
              class="el-icon-upload"></i>
          </el-button>

        </div>
      </div>
    </div>
    <!--预览效果图-->
    <div class="show-preview">
      <div :style="previews.div" class="preview">
        <img :src="previews.url" :style="previews.img">
      </div>
    </div>
    <div class="preview-footer">
      <el-tooltip v-if="!previews.url" class="item" effect="dark" content="选择图片后，此处为图片裁切后的效果图" placement="bottom"
        style="margin-left:260px;margin-top:180px">
        <el-button icon="el-icon-question" type="text" disable>封面预览</el-button>
      </el-tooltip>
    </div>
  </div>
</template>
  
<script>
import { VueCropper } from 'vue-cropper'
import request from '@/API/request';
import { Message } from 'element-ui';
export default {
  name: "CropperImage",
  components: {
    VueCropper
  },
  props: ['Name'],
  data() {
    return {
      name: this.Name,
      fileName: '',
      previews: {},
      option: {
        img: '',             //裁剪图片的地址
        outputSize: 1,       //裁剪生成图片的质量(可选0.1 - 1)
        outputType: 'png',  //裁剪生成图片的格式（jpeg || png || webp）
        info: true,          //图片大小信息
        canScale: true,      //图片是否允许滚轮缩放
        autoCrop: true,      //是否默认生成截图框
        autoCropWidth: 600,  //默认生成截图框宽度
        autoCropHeight: 360, //默认生成截图框高度
        fixed: true,         //是否开启截图框宽高固定比例
        fixedNumber: [1.6666, 1], //截图框的宽高比例
        full: false,         //false按原比例裁切图片，不失真
        fixedBox: true,      //固定截图框大小，不允许改变
        canMove: true,      //上传图片是否可以移动
        canMoveBox: false,    //截图框能否拖动
        original: false,     //上传图片按照原始比例渲染
        centerBox: false,    //截图框是否被限制在图片里面
        height: true,        //是否按照设备的dpr 输出等比例图片
        infoTrue: false,     //true为展示真实输出图片宽高，false展示看到的截图框宽高
        maxImgSize: 3000,    //限制图片最大宽度和高度
        enlarge: 1,          //图片根据截图框输出比例倍数
        mode: '600px 360px'  //图片默认渲染方式
      },
      uploadLoading: false,
      uploadContent: '上传封面',
    };
  },
  methods: {
    //初始化函数
    imgLoad() { },
    //图片缩放
    changeScale(num) {
      num = num || 1
      this.$refs.cropper.changeScale(num)
    },
    //向左旋转
    rotateLeft() {
      this.$refs.cropper.rotateLeft()
    },
    //向右旋转
    rotateRight() {
      this.$refs.cropper.rotateRight()
    },
    //实时预览函数
    realTime(data) {
      this.previews = data
    },
    //选择图片
    selectImg(e) {
      let file = e.target.files[0]
      if (!/\.(jpg|jpeg|png|JPG|PNG)$/.test(e.target.value)) {
        this.$notify({
          title: '上传失败',
          message: '图片类型要求: jpeg、jpg、png',
          type: 'info',
          position: 'bottom-right'
        });
        return false
      }
      this.fileName = e.target.value
      //转化为blob
      let reader = new FileReader()
      reader.onload = (e) => {
        let data
        if (typeof e.target.result === 'object') {
          data = window.URL.createObjectURL(new Blob([e.target.result]))
        } else {
          data = e.target.result
        }
        this.option.img = data
      }
      //转化为base64
      reader.readAsDataURL(file)
    },
    //上传图片
    uploadImg(type) {
      this.uploadContent = '上传中...'
      this.uploadLoading = true
      let _this = this;
      if (type === 'blob') {
        //获取截图的blob数据
        this.$refs.cropper.getCropBlob(async (data) => {
          let formData = new FormData();
          formData.append('id', _this.$store.state.userInfo.id)
          formData.append('file', data, this.fileName)
          //调用axios上传
          request.post('/route/upload/image', formData, {
            timeout: 10000,
          }).then((res) => {
            if (res.data.code === 200) {
              Message({
                type: 'success',
                message: '上传成功',
                customClass: 'message-global'
              })
              _this.uploadContent = '上传封面'
              _this.uploadLoading = false
              _this.$emit('uploadImgSuccess', res.data.data)
            } else {
              Message({
                type: 'error',
                message: res.data.msg,
                customClass: 'message-global'
              })
            }
          }).catch((err) => {
            Message({
              type: 'error',
              message: err,
              customClass: 'message-global'
            })
          })

        })
      }
    },
  },
}
</script>
  
<style scoped lang="scss">
.cropper-content {
  display: flex;
  width: 600px;

  .cropper-box {
    flex: 1;
    width: 600px;

    .cropper {
      flex: 1;
      width: 600px;
      height: 360px;
    }
  }

  .show-preview {
    justify-content: center;
    margin-left: 40px;

    .preview {
      overflow: hidden;
      border: 1px solid #1039db;
      background: #ffffff;
    }
  }
}

.footer-btn {
  margin-top: 20px;
  display: flex;
  display: -webkit-flex;
  justify-content: flex-end;

  .scope-btn {
    display: flex;
    display: -webkit-flex;
    justify-content: space-between;
    padding-right: 10px;
  }

  .upload-btn {
    flex: 1;
    -webkit-flex: 1;
    display: flex;
    display: -webkit-flex;
    justify-content: center;
  }

  .btn {
    outline: none;
    display: inline-block;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
    -webkit-appearance: none;
    text-align: center;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    outline: 0;
    -webkit-transition: .1s;
    transition: .1s;
    font-weight: 500;
    padding: 8px 15px;
    font-size: 12px;
    border-radius: 3px;
    color: #fff;
    background-color: #409EFF;
    border-color: #409EFF;
    margin-right: 10px;
  }
}
</style>